JPH01190056A - Calling system for radio telephone system - Google Patents

Abstract

PURPOSE:To attain low power consumption of a radio telephone set by sounding a call tone at a master set when a reception electric field strength as to a ratio telephone set is a preset reference level or over and then the radio telephone set is located in the vicinity of the master set. CONSTITUTION:When connection control is applied by a control circuit 13 and the reception electric field strength as to the radio telephone set 2 is 100dBmuV or over, the control circuit 13 inputs a signal of high level from a 2nd comparator 37. Then the control circuit inputs the signal and judges it that the electric field state is excellent and the ratio telephone set 2 is located in the vicinity of the master set 1. That is, when the radio telephone set 2 is located in the vicinity of the master set 1, the reception electric field strength reaches 100dBmuV or over. The control circuit 13 applies the said judgement, continues the connection control, finishes it and sound a call signal by energizing the speaker 33 without sending said ringer signal to th radio telephone set 2.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a calling method for a radio telephone device.

(Prior Art) This type of wireless telephone includes, for example, a parent device connected to a wired line, and a portable wireless phone connected to the parent device via a wireless line.

With conventional wireless telephone equipment, when receiving a call from a wired line,
The parent device detects the received field strength for the wireless telephone;
If the received electric field strength is sufficiently high, it is determined that the electric field condition is good, and a signal indicating an incoming call is transmitted to the wireless telephone. When the I-less telephone receives this signal, it emits an @ring tone. When the wireless telephone responds to this call, the wireless telephone enters a talking state through the parent device. Also,
If the received electric field strength of the wireless telephone is too low, the master device determines that the field condition is not good and a clear conversation cannot be made, and does not notify the wireless telephone of the incoming call, and instead produces a ring tone on the parent device side. do.

However, when generating a ring tone on the portable radio telephone side, there is a drawback that power consumption is large and the battery power of the radio telephone is quickly consumed. Furthermore, since the DB telephone is miniaturized, it does not have an acoustic structure that produces a loud ringing tone, and has the disadvantage that the sound pressure of the ringing tone is low.

(Problems to be Solved by the Invention) In this way, in the conventional 8-wireless telephone device, if the receiving electric field is good, a ring tone is generated on the wireless telephone side, but this consumes a large amount of power and the wireless There was a problem in that it hindered efforts to reduce the power consumption of telephones.

Therefore, the present invention proposes a paging method for a radio telephone device that makes it possible to reduce the power consumption of a wireless telephone device by generating a ring tone on the main device side when the radio telephone device is near the main device side. The purpose is to provide.

[Structure of the invention]

(Means for Solving the Problems) The present invention includes a parent device connected to a wired line, and a wireless telephone connected to the parent device via a wireless line,
In the calling method of the BSA telephone device, in which, when a call arrives from the wired line, a signal indicating the incoming call is transmitted from the first two parent devices to the wireless telephone, and a ring tone is generated on the wireless telephone side. a sounding means provided in the device for producing a ringing tone; a detection means for detecting on the parent device side whether or not the received electric field strength of the fishing record radio telephone is equal to or higher than a preset reference level; control means for activating the sounding means instead of emitting a ring tone on the side of the coughless a telephone when a received electric field strength equal to or higher than the reference level is detected by the detecting means when a call is received from the wired r51a; It is characterized by having

(Function) According to the present invention, there is no 41i! on the parent device side! If the received field strength of the telephone is equal to or higher than a preset reference level, a ring tone is generated on the parent device side.

Therefore, if the standard level is set so that the received field strength of the wireless phone is equal to or higher than the standard level when the wireless phone is near the parent device, the wireless phone can
A ring tone is emitted from the parent device side when the device is near the device.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of a radio telephone device to which a paging system according to the present invention is applied.

In the figure, a parent device 1 is connected to a wireless telephone 2 via a wireless line, and is also connected to a wired line 3.

This operation will be schematically explained as follows.

For example, if the switch is set to 4, the wired port, 1
The signal transmitted from 113 becomes a modulation input of transmitter 6 via switch 4 and hybrid circuit 5. The modulated output of the transmission 1fi6 is sent from the transmission antenna 7 to the radio telephone 2 as a radio wave.

On the other hand, radio waves transmitted from the radio telephone 2 are received by the receiving antenna 8, and the received input is demodulated by the receiver 9.

The demodulated signal is sent to the hybrid circuit 5 and the switch 4
It is sent to the wired line 3 via.

Synthesizer 10 outputs a carrier wave signal of a frequency corresponding to a radio channel to transmitter 6 and receiver 9.

One of the outputs of the receiver 9 is input to a received electric field detection circuit 11 to determine the electric field strength.

The other output is output as a data signal included in the received Wa wave, and is input to an identification signal detection circuit 12 for comparing an identification signal determined by the combination of the master device 1 and the non-lit telephone 2.

This identification signal is generally called an IQ code.

The outputs of these detection circuits and the demodulated output of the data signal are input to the control circuit 13 and used for the connection υ1. Further, the control circuit 13 performs radio channel control by controlling the synthesizer 10, and performs controls such as sending a transmission data signal to the transmitter 6 as a modulation input.

On the other hand, the radio telephone 2 similarly has a receiving antenna 14 and a receiving antenna 115, and the demodulated output is output to the receiver 16.

Further, the audio signal from the transmitter 17 becomes a modulation input to the transmitter 18, and a radio wave is transmitted from the transmitting antenna 19.

Furthermore, the wireless telephone 112 includes a synthesizer 20, a received electric field detection circuit 21, and an identification signal detection circuit 22, and a control circuit 23 controls the wireless telephone 2. The speaker 24 is a sounder that emits a ringing tone when a call arrives.

In these power supply systems, the parent device 1 connects the AC plug 25 to Aol 00■, and uses the output of the rectification stabilization circuit 26 in each circuit. Also, this output is current II) 11
11? A resistor 27 is supplied via each charging terminal 28, 29 to a rechargeable battery 30 of the radio telephone 112, and this electric power
! 130 serves as a power source for the wireless telephone 112.

Next, when a ringing signal is transmitted from the wired line [13 at the time of an incoming call, this ringing signal is sent to the 16H2 detection circuit 31.
is input. The 16Hz detection circuit 31 detects this calling signal and applies a detection output to the control circuit 13. When the control circuit 13 determines from this detection output that there is 11 signals, connection 1! Start III 10. At this time,! 1
Data signals are transmitted and received between the 2B station 1 and the wireless telephone 2, and a received carrier wave is received from the receiver 9 in the parent device 1 (8) and sent to the electric field detection circuit 11, and the received electric field detection circuit 11 receives the received carrier wave based on the received carrier wave. Determine the received field strength for the wireless telephone 2.

This received electric field detection circuit 11 is configured as shown in FIG.
is input. The electric field detection section 35 detects the received electric field strength corresponding to the level of the received carrier wave, and applies a DC voltage (2) corresponding to the detected received electric field strength to the first comparator 36 and the second comparator 37, respectively. As shown in the graph of FIG. 3, this DC voltage V is proportional to the received electric field strength. For example, when the received electric field strength is 2QdBμV, the lower limit voltage VA is reached, and the received electric field strength is 100dBμV.
When (2), the reference voltage becomes VB.

The preset lower limit voltage VA is applied to the first comparator 36 along with the direct Wt voltage (2). Then, the first comparator 36 detects that the DC voltage V is the lower limit voltage VA.
If it is below, a high level signal is output, and if the DC voltage (2) is greater than the lower limit voltage VA, a low level signal is output. On the other hand, the preset reference voltage VB is applied to the second comparator 37 together with the DC voltage V. Then, the second comparator 37 outputs a DC voltage V
If is above the reference voltage VBiX, a high level signal is output, and if the DC voltage (2) is less than the base*voltage (2), a low level signal is output. The outputs of these comparators are applied to control circuit 13.

Here, when connection control is being performed by the control circuit 13, 1. The received electric field strength for W line telephone 2 is 20
If it is less than dBμV, the control circuit 13 inputs a high level signal from the first comparator 36. and,
When the control circuit 13 receives this signal, it determines that the electric field condition is not good and clear communication cannot be made. Control circuit 13
When it makes this determination, it interrupts the connection control and sounds the speaker 33 of the parent device [1 to produce a ringing tone.

Furthermore, when the connection control is being performed by the 1ltlj control circuit 13, if the received field strength for the wireless phone f12 is greater than 20 dBμ■ and less than 100 dBμV, the control circuit 13 controls the first comparator 36 and the A low level signal is input from each of the two comparators 37. When the control circuit 13 inputs these signals manually, it determines that the electric field condition is good. υ11!
! When the 1 circuit 13 makes this determination, it continues and ends the connection control, and causes the ringer signal to be transmitted from the transmitter 116 via the transmitting antenna 7. In the wireless telephone 2, the ringer signal received by the receiver 15 via the receiving antenna 14 is applied to the control circuit 23, and when the control circuit 23 receives this ringer signal, it makes the speaker 24 ring. At this time, when the hook switch 32 is turned on, the control circuit 23 causes the transmitter 18 to transmit an on-hook signal via the transmission antenna 19. The parent device 1 receives 1 via the receiving antenna 8.
The on-hook signal received at 9 is applied to the control circuit 13, and when the on-hook signal is input, the control circuit 13 turns on the switch 4. This starts the call.

Furthermore, when the control circuit 13 is controlling the connection, the received electric field strength of the wireless telephone 2 is 100.
If the voltage is dBμV or more, the control circuit 13 inputs a high level signal from the second comparator 37. and,
When the control circuit receives this signal, it determines that the electric field condition is good and that the wireless telephone va2 is in the vicinity of the master device 1.

In other words, the wireless telephone 2 is tli! If it is near the device 1, the received electric field strength will be 100 dBμV or more. When the control circuit 13 makes the above judgment, it continues and ends the connection control, and without transmitting the ringer signal to the radio telephone 2, it sounds the speaker 33 to produce a ring tone. This ringing tone is sufficiently loud so that it can be heard by the wireless telephone 2 located near the parent device 1. At this time, when the wireless telephone 2 side detects an incoming call and turns on the hook switch 32, the ii control circuit 23 causes the transmitter 18 to transmit an on-hook signal via the transmitting antenna 19.

In the parent device 1, the on-hook signal received by the receiving va9 via the receiving antenna 8 is applied to the control circuit 13, and the on-hook signal is applied to the control circuit 13.
3 turns on switch 4 when this on-hook signal is input. This starts the call.

In this way, in this embodiment, there is no I! Not only when it is determined that the received field strength of the i1 telephone 112 is too low to make a clear conversation, but also when it is determined that the received field strength is so high that the wireless telephone 2 is in the vicinity of the master device 1. Also, a ring tone is generated on the parent device 1 side. When such a ring tone is generated on the side of the parent device 1, there is no need to generate the ring tone on the side of the wireless telephone 112, and therefore the power consumption of the battery 30 of the wireless telephone 2 can be reduced. Furthermore, the parent W device 1 is large enough to have an acoustic structure that emits a loud ringing tone, and therefore has the advantage that the sound pressure of the ringing tone is large.

[Effects of the Invention] As explained above, according to the present invention, the received electric field strength for a no-1IiI telephone line is equal to or higher than a preset reference level, and therefore no! l! When the telephone is near the parent device, the parent device produces a ringing tone, so it is possible to provide a calling method for a radio telephone device that makes it possible to reduce the power consumption of wireless telephones.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a radio telephone device to which the paging system according to the present invention is applied, FIG. 2 is a block diagram showing the configuration of the received electric field detection circuit shown in FIG. 1, and FIG. is a graph used to explain the operation of the received electric field detection circuit shown in FIG. 2. DESCRIPTION OF SYMBOLS 1... Parent device, 2... Wireless telephone, 3... Wired line, 4... Switch, 5... Hybrid circuit, 6
．． 18...Transmitter, 7.19...Transmission antenna, 8
．． 14...Receiving antenna, 9.15...Receiver, 1
0.20...Synthesizer, 11.21...Received electric field detection circuit, 12.22...Identification signal detection circuit, 13
．． 23... Control circuit, 16... Receiver, 17...
Transmitter, 24° 33... Speaker, 25... AC plug, 26... Rectification stabilization circuit, 27... Current il
+I control resistor, 28.29...charging terminal, 30...
Battery, 31... 16Hz detection name, 32... Hook switch, 35... Electric field detection unit, 36... First comparator, 37... Second comparator. The first diagram! IP-Emotion Figure 3

Claims (1)

[Scope of Claims] Comprising a parent device connected to a wired line and a wireless telephone connected to the parent device via a wireless line, when a call is received from the wired line, a signal indicating the incoming call is sent to the A calling method of a wireless telephone device in which a transmission is sent from a parent device to the wireless telephone and a ringing tone is generated on the wireless telephone side, comprising: a sounding means provided in the parent device and generating a ringing tone; detecting means for detecting whether or not the received electric field strength with respect to the wireless telephone is equal to or higher than a preset reference level; 1. A calling system for a radio telephone device, comprising: control means for activating the sounding means instead of emitting a ringing tone on the radio telephone side when the intensity is detected.